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why supervisor-TPS3700 output square wave when volage under UVLO?

Question asked by 翔李 on Jan 2, 2016
Latest reply on Jan 3, 2016 by igorpadykov

hi,

The TI is so bad that i give up to look for them,so,thanks NXP-FSL for helping me.

I use tps3700 to supervisor 12V in the car,when voltage below 10V,the tps3700 must output 0 to the PNP+PMOS or DCDC ic.

when there is no load in the board,tps3700 work well,but,when the load is 12v@0.65A,tps3700 output square wave(between 0 to 10V change) while the voltage between 9.8V~10V.

 

also,if do not use tps3700,the pnp+pmos or DCDC ic work well.

 

The attachments are schematic diagram.

link:

why TPS3700 output square wave when volage under UVLO? - Supervisor and Reset IC Forum - Supervisor and Reset IC - TI E2…

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